Patents by Inventor Ramiro Guerrero-Santos

Ramiro Guerrero-Santos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Synthesis of block polymers obtained by controlled free radical polymerization
    Patent number: 6890980
    Abstract: The invention concerns a method for preparing a first generation polymer comprising a step which consists in free radical polymerization of a composition comprising: at least an ethylenically unsaturated monomer, a source of free radicals, and at least a cyclic organic compound including at least a tetrathiophosphate group.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: May 10, 2005
    Inventors: Mathias Destarac, Frédéric Leising, Alex Dureault, Daniel Taton, Yves Gnanou, Ramiro Guerrero-Santos
  • Synthesis of block polymers obtained by controlled free radical polymerization
    Publication number: 20040030041
    Abstract: The invention concerns a method for preparing a first generation polymer comprising a step which consists in free radical polymerization of a composition comprising: at least an ethylenically unsaturated monomer, a source of free radicals, and at least a cyclic organic compound including at least a tetrathiophosphate group.
    Type: Application
    Filed: August 28, 2003
    Publication date: February 12, 2004
    Inventors: Mathias Destarac, Frederic Leising, Alex Dureault, Daniel Taton, Yves Gnanou, Ramiro Guerrero-Santos
  • Method for functionalizing a polymer and preparing copolymers and terpolymers
    Patent number: 6376615
    Abstract: The present invention describes the preparation of copolymers grafted by the so-called “grafting from” method, comprising two steps. In the first step, a polymer of a variable type referred to as poly(M1) is reacted with persistent free radicals of the type diphenyltrialkylsilyloxymethyl to form a reactive polymer poly(M1)F, containing a variable number F of these groups attached to the chain. F represents the average functionality of the reactive polymers and may be predetermined by controlling the ratio of poly(M1) and the free radical generator or TPES. In the second step, poly(M1)F is dissolved in a monomer M2 and then redissociated by heating to temperatures of 110-130° C. to produce the macroradical poly(M1) and the persistent radicals. The macroradical poly(M1) rapidly initiates polymerization whereas the diphenyltrialkylsilyloxymethyl radical stays temporarily on the sideline of the initiation reaction.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: April 23, 2002
    Assignee: Centro de Investigacion en Quimica Aplicada
    Inventors: Ramiro Guerrero-Santos, Hortensia Maldonado Textle, Maria Esther De Leon Saenz